39140643 has 4 divisors (see below), whose sum is σ = 52187528. Its totient is φ = 26093760.

The previous prime is 39140639. The next prime is 39140653. The reversal of 39140643 is 34604193.

39140643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 39140643 - 2² = 39140639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39140643.

It is not an unprimeable number, because it can be changed into a prime (39140603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6523438 + ... + 6523443.

It is an arithmetic number, because the mean of its divisors is an integer number (13046882).

Almost surely, 2^39140643 is an apocalyptic number.

39140643 is a deficient number, since it is larger than the sum of its proper divisors (13046885).

39140643 is a wasteful number, since it uses less digits than its factorization.

39140643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13046884.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 39140643 is about 6256.2483166831. The cubic root of 39140643 is about 339.5283049562.

The spelling of 39140643 in words is "thirty-nine million, one hundred forty thousand, six hundred forty-three".